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Moisture and Water Content Analysis
Water content decides the stability of medicines, the shelf life of foods and the quality of oils and fuels. Two methods cover the range: Karl Fischer titration for trace water, and infrared drying for bulk moisture.
- Trace water
- Karl Fischer
- Bulk moisture
- IR drying
- KF readability
- 0.01 ml
- Balance capacity
- 10 g
Recommended instruments
How it is measured
Prepare
Weigh the sample. For Karl Fischer, condition the titration cell to a dry end point first.
Measure
Karl Fischer reagent reacts only with water; the infrared balance records mass lost on heating.
Report
Water content is calculated from reagent consumed, or from the change in mass.
Where it is measured
Frequently asked
Karl Fischer or infrared balance?
Karl Fischer is specific to water and suits low levels in APIs, oils and solvents. The infrared balance is faster for routine checks on powders, granules and grains, but measures all volatiles lost on heating.
What does motorised dispensing change?
The microprocessor titrimeter doses reagent with a motorised pump instead of a glass burette, reads consumption to 0.01 ml and rinses the tubing after each analysis.
Choosing a moisture method?
Tell us the sample and the expected moisture level. A specialist will suggest the right instrument.